<template>
    <div class="singer">
    	<list-view @select="selectSinger" :data="singers"></list-view>
        <router-view></router-view>
    </div>
</template>
<script type="text/ecmascript-6">
import {
    getSingerList
} from 'api/singer'
import {
    ERR_OK
} from 'api/config'
import Singer from 'common/js/singer'
import ListView from 'base/listview/listview'
import {mapMutations} from 'vuex'

const HOT_NAME = '热门';
const HOT_SINGER_LEN = 10;
export default {
    data() {
        return {
            singers: []
        }
    },
    created() {
        this._getSingerList();
    },
    methods: {
        selectSinger(singer){
            this.$router.push({
                path:`/singer/${singer.id}`
            })
            this.setSinger(singer)
        },
        _getSingerList() {
            getSingerList().then((res) => {
                if (res.code == ERR_OK) {
                    this.singers = this._normalizeSinger(res.data.list);
                }
            })
        },
        _normalizeSinger(list) {
            let map = {
                hot: {
                    title: HOT_NAME,
                    items: []
                }
            };
            list.forEach((item, index) => {
                if (index < HOT_SINGER_LEN) {
                    map.hot.items.push(new Singer({
                        id: item.Fsinger_mid,
                        name: item.Fsinger_name
                    }))
                }

                const key = item.Findex;
                if (!map[key]) {
                    map[key] = {
                        title: key,
                        items: []
                    }
                }
                map[key].items.push(new Singer({
                    id: item.Fsinger_mid,
                    name: item.Fsinger_name,
                }));
            });
            // 为得到有序列表,处理map
            let hot = [];
            let ret = [];
            for (let key in map) {
                let val = map[key];
                if (val.title.match(/[a-zA-Z]/)) {
                    ret.push(val);
                } else if (val.title === HOT_NAME) {
                    hot.push(val);
                }
            }

            ret.sort((a, b) => {
                return a.title.charCodeAt(0) - b.title.charCodeAt(0)
            })

            return hot.concat(ret)
        },
        ...mapMutations({
            setSinger:'SET_SINGER'
        })


    },
    components:{
		ListView
	}
}
</script>
<style scoped lang="stylus" rel="stylesheet/stylus">
	.singer
		position:fixed
		top:88px
		bottom:0
		width:100%
</style>